.cube-bloc{
    width:90px;
    height:90px;
    border: black solid 5px ;
    border-radius: 8px;
    float:left;
}
.container{
    width:300px;
    height:300px;
    margin:120px auto;
}
.box{
    perspective: 835px;
    transform-style: preserve-3d;
    position:relative;
}
.content{
    width:300px;
    height:300px;
    transform-style: preserve-3d;
}
.surface{
    width:300px;
    height:300px;
    position: absolute;
    text-align: center;
}
